using System;
 
public class A
{
	public A()
	{
		Console.WriteLine("A::A(); called");
	}
 
	public A(String arg)
	{
		Console.WriteLine("A::A(" + arg + "); called");
	}
}
 
public class B : A
{
	public B()
	{
		Console.WriteLine("B::B(); called");
	}
 
	public B(String arg)
	{
		Console.WriteLine("B::B(" + arg + "); called");
	}
}
 
public class C : A
{
	public C() : base()
	{
		Console.WriteLine("C::C(); called");
	}
 
	public C(String arg) : base(arg)
	{
		Console.WriteLine("C::C(" + arg + "); called");
	}
}
public class Test
{
	public static void Main()
	{
		A a1 = new A();
		A a2 = new A("a2");
		Console.WriteLine();
 
		B b1 = new B();
		B b2 = new B("b2");
		Console.WriteLine();
 
		C c1 = new C();
		C c2 = new C("c2");
	}
}

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